Air conditioner



FIG. 1 is a front, bottom, and right side perspective view of an air conditioner showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is an enlarged vertical cross-sectional view thereof taken along line 8-8 in FIG. 2, with the broken-line disclosure understood to show internal elements which are part of the article in which the claimed design is embodied, but which form no part of the claimed design. 

The ornamental design for an air conditioner, as shown and described. 